Safety throw-off iron



April 14, 1931. E, TIMES AL 1,806,367.

SAFETY THROW-OFF IRON Filed July 24, 1928 2 Sheets-Sheet l April 14, W31. E. TIMES ET AL.

SAFETY THROW-OFF IRON Filed July 24, 1928 2 Sheets-Sheet 2 Patented Apr. 14, 1931 UNITED STATES:

PATENT oFFicE' EDWARD TIMIBS AND LESTER E. Peon; or LOS ANGELES, CALIFORNIA, ASSIGNORS, BY

MESNE ASSIGNMENTS, TO rrin'narionar. SUPPLY "COMPANY, or TOLEDO, OHIO, A

CORPORATION OF OHIO Application filed my 24., 1328. Serial No. 295,016.

This invention relates to safety throw-off irons and is more particularly related to a safety connecting device that may be easily and safely manipulated between a central power pumping eccentric and the pull rod leading to each pumping well; I

Heretofore it has been common practice to connect the pull rods, which connect with and drive the pump mechanism of wells, particularly oil wells, with a central source of power so that a plurality of well pumping mechanisms may be driven from a centralpower plant. Many times during the; operation ofsuch a combination it becomes necessary to disconnect the pull rod of a-single well pump to repair, replace; or renew some part of the pumping mechanismv connected thereto or driven thereby.

An object of this invention is to provide a connecting means between a centrally located power device and the pumping mechanism of each well that may be manipulated to effect a connection between the central powerjdevice and any well pumping mechanism, or to effect a disconnection therebetween without necessitating the stopping of the central power device, and which con necting means, herein termed a throw-off ron, maybe manipulated easily and with entire safety to the operator.

Other objects or this invention includethe provision of a safety throw-0E iron which is of simple, but still effective construction,

. which includes a minimum of working parts and is adaptable for installation under substanti ally all working conditions. Other objects and advantages of this invention it is believed will be apparent from the following detailed description of a preferred embodiment thereof as illustrateduin the accompanying drawings.

In the drawings V v Figure 1 is a plan diagrammatic view of a pumping installation and illustrating safety throw-off irons embodying this invention as adapted therein. I

Figure 2 is an enlarged top plan view of a safety throw-off iron embodying this. n-

vention illustrating the same in connected.

or latched position.

SAFETY THROW-OTFF InoN Figure 3 is a sectional side elevation thereof taken substantially on the line 3-3 of Figure 2 and illustrating the throw-off iron in position when the connection between the well pull rods and the central power plant is in actuating condition. j

Figure t is a view similar toFigure 3 illustrating the throw-off iron as actuated to break the connection between the well pull rods and the central power plant.

Figure 5 is a sectional end elevation taken substantially on the line 55 of Figure 2.

In the preferred embodiment of this invention illustrated in the accompanying drawings, 1 indicates a centrally located drive wheel which forms an eccentric fordriving the pumping mechanisms (not shown) of a plurality of wells through connecting rods 2. The wheel 1 is driven in any suitable or desirable mannersuch, for example, as by thev belt 3- connected through,

a belt tightener 4: with a prime mover .(not

nism is a safety throw-off iron embodying til hifi this invention, which is preferably of the following construction:

vA base casting 5 isbolted through the ears 6 to a foundation block 7. Secured to the base casting 5 through ears 8 are guide rods 9. The guiderods 9 are'spaced apart and extend'parallel to the direction of extension of the connecting rod 2 and provideguidenieans for a traveling block 10. The traveling block 10 is guided by the rods 9 extending through longitudinally extending bores formed through. the block 10. In order to permit the device to be assembled easily, the rods 9 are provided with nuts 11 at their opposite ends.

A slide l2 extends through a guide-way 13 formed axially of the block 10 and is secured by means of a-coupling 14- to the portion of the connecting rod 2 which extendsto the eccentric wheel '1 The slide '12 is slotted longitudinally of its length as indi-Q cated at 15 to permit the slide 12 to slide through the block 10 when the latch pin 16 is lifted out of engagement wit-l1 the slide 12. Secured to the block 10 are rods 17 which are connected to a cross-head 18. The crosshead 18 is connected at 19 with the opposite .end of the connecting rod 2 or the end of the connecting rod which extends to and is connected wi'ththe pumping jack or pumping mechanism of the oil well. Formed in the end 20 of the slide 12 is a pocket or recess 30 into which the end of the latch pin 16 fits to connect the slide 12 with the block 10 In order to permit the block 10 to be held in position so that the same may be readily connected with the slide 12 after the latch pin 16 has been lifted to disconnect the block 10 from the slide 12, latch means are provided for holding the block 10 in position to pass into the recess formed in the end of the slide 12 without necessitating the operator manually pulling the block 10 to the correct position to effect the connection which is a dangerous operation, particularly. in that it would necessitate the holding of the block 10 in a definite position and also a manipula tion of the latch pin 16 at the same time. The latch means includes a latch rod 22 which is journaled in the bosses 23 formed on the Opposite sides of the base casting 5 and which latch rod 22 is formed integral with a latch bar 24 which is adapted tobe' rotated up into position to engage the end of the'block 10 and hold the block 10 in position to permit the latch pin 16 to be dropped into its proper recess when the slide 12 has been reciprocated to the proper position by the eccentric wheel 1. The latch rod 22 is bent as illustrated at 25 and is provided with a weighted ball 26 onits ends to normally hold the latch bar 24 out 'ofposition from engagement with the block 10.

When it is desired to release the connection between the separate portions of the connecting rod 2, the operator will raise the latch bar 24 into position to engage the block 1() on reciprocation of the block 10 from the eccentric wheel 1 and will, 011 engagement of the latch bar 24 with the block 10, lift the latch pin 16 out of latching position, thereby releasing the slide 12 from engagement with the block 10. The latch bar 24 then holds the 'pumping mechanism which is connected with the portion of the connecting rod 2 which extendstothe pumping *inechanism "in position to permitgthe ready connection with the reciprocating slide 12,

Having fully described our invention, it is to be understood that we do not wish to be limited to the details herein set forth, but our invention is of the full scope of the appended claims.

We claim 1. Coupling means for power transmission for oilwell pumps comprising a bed plate, two parellel guide bars suitablysecured to said bed plate, a cross-head slidably mounted on said guide bars and having a guide way formed axially with said cross-head, a slide slidably mounted in said cross-head guide way and having a recess at one end thereof, a latch pin arranged to pass through said cross-head and to enter said slide recess, locking means comprising a latch rod suitably journa-led in said bed plate, a latch bar suitably secured to said latch rod and a weighted actuating lever.

2. A safety throw-ofl iron coupling means for power transmission for oil well pumps comprising-a base casting, parallel guide barssuitably mounted on said base casting,

a block slidably mounted on said guide bars,

having a guideway formed axial with said cross-head and provided with connecting means for the pumping mechanism, a slide slidably mounted in said block guideway and having a recess at one end and provided with connecting means for the power drive, a removable latch pin arranged when in operative position to op'eratively connect said block and said slide, locking means arranged when actuated to engage said block and comprising a latch rod suitably journaled in saidbase casting, a latch bar suitably secured to said latch rod and a weighted actuating j lever. p

3. A safety throw-off iron coupling means for power transmission for oil well pumps comprising a base casting, guide bars suitably mounted on said base casting, a block slidably mounted on said guide bars and h'avin'ga guideway formed axial with said block and pumping mechanism'connecting means, a slide slidably mounted in said block guideway and having a recess at one end and a' powerdrive connectingimeans, a removable latch pin arranged when in position to operatively connect said block and said slide, locking means arranged when actuated to engage said block and comprising a latch rod journal'ed to said base casting, a latch bar secured to saidlatch rod and a weighted actuating lever, whereby said power transmission can be safely connected or disconnected while the power drive is operating. c

4. In a device of the kind described, the combination of a bed plate, a block guided to slide on th b d-plate, a slide with means for connecting the same to "a. "power nr1 a5h-,

anism, a pin and slot connection between the block and the slide, means for connecting the block to the pump rod, and a latch bar pivotally mounted on the base casting and apable of being moved into the path of the block to arrest the movement of the same in its travel in the direction of the pump.

5. In a device of the kind described, the

combination of a bed plate, a block guided,

to slide on the bed plate, a slide with means for connecting the same to a power mechanism, a pin and slot connection between the block and the. slide, means for connecting the block to the pump rod, and a latch bar pivotally mounted on the base casting and capable of being moved into the path of'the block to arrest the movement of the same in its travel in the direction of the pump, and a weighted lever connected with the latch bar for holding the same inthe path of the block and in a depressed position out of the path of the block.

Signed at Los Angeles, Calif., this 18th day of July, 1928.

EDWARD TIMBS LESTER E. PECK. 

